System of electrical distribution.



PATENTED MAY 8, 1906.

J. L. WOCDBRIDGE.

SYSTEM OF ELECTRICAL DISTRIBUTION.

APPLICATION FILED APR. 19, 1905.

UNITED STATES PATENT OFFICE.

JOSEPHLESTER WOODBRIDGE, or PHILADELPHIA, PENNSYLVANIA.

SYSTEM OF ELECTRICAL DISTRIBUTION- Specification of Letters Patent Jcatentea may 8, 1906.

To all whom it may concern:

Be it known that I, J OSEPH LESTER WOOD- BRIDGE, a citizen of the United States, and a resident of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented a certain newand useful System of Electrical Distribution, of which the following is a s ecification.

The principa object of the resent inven tion is to provide for the regu ation'of combined alternating-current and direct-current loads by means of a storage battery in cases where both kinds of currents areemployed in connection with a general distribution sys tem.

To this and other ends, hereinafter set forth, the invention, stated in general terms, comprises the improvements to be presently describedand finally claimed.

The nature, characteristic features,. and scope of the invention will be more fully understood from the following description, taken in connection with the accompanving drawing, forming part hereof, andin which.

is illustrated diagrammatically a system of distribution embodying features of themvention. k

In the drawing the alternating-current lines 1 2 3 and the direct-current lines f5 areconnected together through the intervention of the rotary converter 6 or its equivalent. The battery 7 and its booster 8 (which may be appropriately driven) are connected in series across the direct-current lines or busbars 4 5. The booster voltage is controlled by means responsive to variations in the alternating-current and direct-current loads.

9 and 10 are solenoids interposed, respectively, in the alternating-current-generator circuit and in the direct-current-generator circuit. The former includes the enerators 1 1 and 12, and the latter includes t e generators 13 and 14. These solenoids operate the regulator 15, which in its turn controls the fie d 16 of the booster, so that the latter is'responsive to variations of load on either circuit. The operation of the regulator is fully explained in Letters Patent of the United States numbered 763,168, dated June 21, 1904, granted to Justus B. Entz, and need not be here repeated, as it is well understood.

When the load on either the alternating or direct current circuits, or both, increases, the solenoids 9 and 10 cause pressure to be exerted upon the part 17 and relieves the part 18 of pressure. The result of this is that the,

held 16 is properly changed in such a way that the battery discharges, whereas if the load on either or both of the two circuits should fall off the solenoids 9 and 10 permit the spring or equivalent 19 to cause pressure to be exerted upon the part 18 and to be relieved on the part 17, so that the field 16 is appropriately changed for causing the battery to charge, and during times of average combined loads on the two circuits the conditions of pressure on the parts 17 and 18 are such that the batterymay neithercharge nor dischar e.

It wil be obvious to those skilled in the art to which the invention relates that modifications may be made in details without departing from the s irit thereof. vention is not Iimited further than the prior state of the art may require; but,

Having thus described the nature and objects of my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. The combination of alternating and direct current circuits having an appropriate converter operatively econnected between them, a battery and booster, operatively arranged in respect to the direct-current circuit, a booster-regulator, and solenoids interposed in the generator-circuits of the direct and alternating systems and operativelyv arranged in respect to the booster-regulator, substantially as described.

2. The combination of alternating and di- 'rect current circuits having an a propriate converter operatively connecte between them, a battery and oosteroperatively arranged'in respect to the direct-current circuit, and a booster-regulator responsive to variations of the load on either circuit, substantially as described.

3. The combination of alternating and direct current circuits having an a propriate converter operatively connecte between them, a battery operatively arranged in respect to thedirect-current circuit, and means ada ted to cause the battery to charge and discliarge and operatively arranged to resubstantially as describe spond to variations of load on either circuit,

In testimony whereof I have hereunto signed my names J. LESTER WOODBRIDGE.

Witnesses:

W. J. JACKSON, K. M. GILLIGAN.

Hence the inl 

